| U20 World Cup 1983 in Mexiko - Appearances as Referee |  |
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| 07/06/1983 | Brazil | - | Nigeria | 3:0 | 4 | - | - |
| 11/06/1983 | Uruguay | - | South Korea | 1:2 aet | 2 | - | - |
| U20 World Cup 1983 in Mexiko - Appearances as Referee | |
|
|
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| 07/06/1983 | Brazil | - | Nigeria | 3:0 | 4 | - | - |
| 11/06/1983 | Uruguay | - | South Korea | 1:2 aet | 2 | - | - |
| Complete name: | Carlos Alfaro |
| Born: | |
| Place of birth: |
Costa Rica |
| Nationality: |
Costa Rica |